1. The Bacterial Cell
By: Ashley Hobson

2. What are bacteria?

4. Bacterial Basics: No nucleus or organelles Evolved prior to eukaryotes
In the prokaryote domain
No nucleus or organelles
Evolved prior to eukaryotes
Live in all kinds of places (ie. plants, colon, sea)
More bacterial cells in humans than animal cells
Can be harmful or helpful
As unrelated to humans as can be for a living species
Oldest fossil bacteria dates back 3.5 billion years

5. Green Non-sulfur Bacteria
Green due to photosynthesis and light
Growth in the dark gives dark orange coloring
Tend to form flexible filaments
Chloroflexus auranticus

6. Gram Positives/Negatives
Gram-positive bacteria are stained dark blue to violet by means of Gram staining. Their counterparts, gram-negative bacteria, cannot retain the crystal violet stain, and instead appear red to pink.

7. Moraxella bovis, pinkeye
Purple Bacteria
Moraxella bovis, pinkeye

8. Cyanobacteria

9. Bacteroides
Gram negative
Bacillus (rod like) shape
Anaerobic

10. Thermotoga Unique outer sheath, “toga” membrane Thermotoga lettingae
Grows on methanol and acetate
Different from other thermotoga bacteria, can provide ways to enhance others

11. The Cell Structure

12. SPORES!!!
Provides bacteria with protection
Can withstand extreme temperatures
Impervious to toxic chemicals

13. Escherichia coli Gram negative
Found in warm blooded mammals’ large intestines
Produces Vitamin K for blood clotting
One strain attacks intestinal walls and enters bloodstream (0157)

14. MRSA Spreads in most hospitals Infects wounds
Healing process is delayed
Methicillin-resistant Staphylo- coccus aureus

15. Quoram Sensing

16. What about food?
Phototrophs
Organotrophs
Lithotrophs

17. Bacteria Videos Movement http://www.youtube.com/watch?v=6p9e0oolbmE
Fission

18. Bacteria and YOU
Bacteria, specifically Lactobacillus, gives sourdough bread it’s signature taste
Yogurt contains the bacteria,  Streptococcus thermophilus and also Lactobacillus, which gives it a texture and tangy taste
Your large intestines house certain bacteroides which are responsible for making Vitamin K, a necessity for blood clotting

19. THE END Questions? Sources:
(Multiple bacteria videos)